Final answer:
Hernan Cortés overthrew the Aztec Empire in 1521.
Step-by-step explanation:
Hernan Cortés was the Spanish military leader who overthrew the empire of the Aztecs. In 1521, Cortés and his army of conquistadors defeated the Aztec Empire, led by Emperor Moctezuma, resulting in the fall of Tenochtitlan, the Aztec capital.
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